Shapes shear



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1,511,952- H. J. DONAHOO.

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Nif/V M1 Patented Oct. 14, 1924.

j UNITED STATES 1,511,952 PATENT .oFFlc-la.` v

HARRY J. noNAHoo, or MoLINE, ILLIIIoIs.l

SHAPES SHEAR.

Application filed` January 10, 1923. Serial No. 611,811.A

To all whom t may concern: Y

Be it known that I, HARRY J. DoNAHoo, a citizen of the United States, residing at 620 17th Street, Moline, in the count of Rock Island and State of Illinois, have yinvented certain newv4 and useful Improvements in Shapes Shears; and I do hereby declare the following to be a full, clear, and exact description of :the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in shapes shears, and has for one of yits principal objects the provision of a shearing machinefor cutting metalarticles of any shape, as I-beams, angle bars, channels, T bars, or any other shape.

One of the important objects of this invention is the provision of a shapes shear j which v.sh-all be adapted to cut metallic beams, or other objects, with a minimumexpenditure of power, and in al very efficient manner, and also in such a way that there will be no possibility of twisting, bending, or distorting the material being cut, especially at the edges or ends. A

One of the important features of this invention is the provision of Va shapes shear .for metal beams, or otherfobjects,l which shall act to shear orcut the metal in a sortl of sliding, diagonal, or raking stroke, whereby a shearing stress will be applied to the materialv at a plurality of points at the same time, and the sheared area is less thanV the entire cross sectional area of the mal terial itself. This provides for a muc-h more efficient manner of cutting the material, and

results ina cleaner and surer cut withv a minimum expenditure of power.

Still another important object of this invention is the provision of a shapes lshear which shall be provided `with removable cutting blades or dies, lwhich Vcutting blades or dies can be readily removed and replaced when worn,kor can be ground down and resharpened and replaced in the machine for further use, thereby aifording a very considerable lsaving due to the replacement ot these parts.

Another., and further object of the invention is the provision of a shapes shear which'will be provided with cutting blades adjustable to and from each other in both the xed and movable cutting members, and which, in this `manner7 provides for a `wide range of operation, and an ease of,

vproved device of this invention. A

handling, no `mattefrwhat the material being cut. v

Other and further important objects of the invention will be apparent from the disclosures in the accompanying drawings and following speciiication.`

The invention, in a preferredr form, iis

bers, and is taken on the line 4.--4 o'F igure 2. Y A y v As shown in the drawings:

the ze,"l

. cutting blades or dies to the shearingv mem- The reference `numeral S10 indicates generally the frame or base of the improved machine of` this inventiomwhich it is under-` stood, is a particularly heavy blockor casting of metal, the size of which will correspond to the strength and solidity required with respect to the particular' lbeams or" members which` are adapted 'to be :cut in the machine.

Adapted to cooperate with theiixed frame member 10 isa movable blade member`1'2,l `l which operates as the cutting element. This" movable member 12 is likewise composed kof. 7 I

suitableheavy metal, ,and 'is ,pivoted about an axle 14', and securelymounted" thereon, and moves between integral portions of the base or frame, as shown at 10 and 20.1, j

Passing through a suitableopening yin the rear endof the lblade member 12is a' shaft 16, having an'eccentrically mounted cam 18 thereon, asbest shown in Figure v1 by the A portion of the iframe mem-" dotted lines. p ber 2O is 'built aro-und the outer side yor face ot the movablel bladey lmember 12, vand is adapted tocooperatelwith and forms part ol the original base or frame 10. The axles or shaftsrll andv 16 pass through bothpoif tions 10 and 20, and moreover, thisA auxiliary frame member 2O also Aserves to hold A'the cutting blade member `12 securely inposition Further, an extension or lug 22 is made iin-ij tegral with the movable blade memberw12, and this lug 22 passes through a suitable bracket 24, fastened by means ofbolts 26- to the side of the frame 10, whereby a close` cooperation is insured between the inner face of the movable cutting member 12, and the corresponding face of the iiXed frame member 10 at all times.

A motor 28 is provided for the suitable operation of the device, and this motor 28 acts through a series of gears 30 to rotate the shaft 16, which has the eccentric or cam 18 thereon. 4A `single revolution clutch 32,

'bf any suitable or preferred construction, is

mounted o-n the shaft 16, ,whereby a single operation or revolution of the shaft 16 is provided for, and, as best illustrated in Fig ure 1, the shaft 16 will be so actuated upon by the clutch 32, thatit will always come to `'rest at a point where the high point of the cam 18 is so positioned with respect to the movable cutting member 12 that the opening or spaces for the die members or cutting blades in the movable member 12 and the frame 10 respectively are always automatically aligned.

As best shown in Figures 3 and t, a set of -removable and adjustable cutting blades or 'dies 34 'and 36 are positioned in the members 10 and 12 respectively. Sleeves 38 and 40 are also provided respectively for the proper maintenance in positiony of theA cutting blades yor die` members 34 and 36. These sleeves 38 'and 40 'are held in position by means ofbolts 42 'or other suitable means, and, as best shown by the dotted lines in Figure 2,v one lset vof -each of the cooperating sleeves 3 8 and 40 is made adjustable laterally by having the same made slidable in suitable T-slots in the members 10 and 12 respectively. Proper adjustment of these movable members, and a secure locking of Ysame in adjusted position is accomplished by means of bolts ,48, which have their ends projecting beyond the end faces of the frame and blade members, and are fitted with lock nuts 50, as shown. It will be evident 'thatv vby this construction Aa ready adjustment of the Vcutting dies 34 and 36 may e had toaccommodate beams, channels, etc.,

of various sizes, and moreover, should the `machine jammed, the cutting parts can be easily reaccidentally become stuck or moved, and 'breakage prevented.

yThe sleeves 38 and 40 are positioned in` openings passing through the members 10 and 12, which openings are aligned at the time when `the cam 18 is at its high point ywith respect to the motion of the movable blade member 12,` vthe pivot 11i of which is positioned on a line extending at an angle of from 20 to 40 from a vertical line passjingthrough the center of the openings just described. These angles have been found by experiment to be approximately the best angles at whichthe efficient cutting of any member in the dies could be accomplished. As shown inthe drawings, therdie membe'rs or blades 36 are illustrated as forming a cutting member for an Lbeam. Obviously these die members may be changed as to shape for cutting of various members, and also as to size, without departing from the spirit of the invention. Further, the same dies or cutting members 36 may obviously' be used to cut other members than I-beams,`

ner, and as already explained, are adjustable.

It will be evident that in the operation of this device a shearing force will be exerted upon any material in the dies 36 Aand 34,1

which shearing force shall be uph ardly and extending through an arc wit. the pivot point 14 as its center. Further, the downward tilting motion of the rear end *ofthel movable member 12 will result inan increase of power, and a subsequent 'cutting or shear- The cutting ing action on the material in the dies which cannot be accomplished as well in any Aother Again, it has been "demonstrated that by positioning the central portion of the pivot point 14` on -any line .eXtending'at an angle of from 20O Vto 400 from the center of the vertical line passing through the center of the openings in which the dies Se 'and 36 are positioned, will result in an enormous increase in the cutting power, due to the fact that the shearing action takes place at vquite a plurality of parts ofthe I-beam,l angle bar, or T bar, lor any other materialin the dies.

It will further be evident that by the use of' this construction a plurality -of movable cutting members may be used, each acting about a common pivotal point, but "operated on by eccentrics at different times, so that a double shearing action is accomplished. Also, a plurality of pivotal .points may be used if desired, however, "thereonstruction shown in the drawings is`-pre 'ferred, as by this device the beam, or Jbar to be cut may be passed through ythe openingin the fixedbase member 10, and theV motion of the movable cutting fmembe'r'512 is such that during the cutting only` a slight tilting of the beam or y'bar results,

and the bar may then be easily'trans'ferred to la rolling table or other conveying means after it hasbeen cut, andl absolutely no lifting motion `)is necessary uponrthe `main end of the bar or beam from which the parts are being cut.

'I am aware that many Achanges may lvbe made and numerous details of construction varied throughout a wide range without de parting from the principles of this invention, and I, therefore, do notpurpose limiting the patent granted hereon otherwise than as necessitated by the prior art.

I claim as my invention:

1. In a shapes shear, a frame, al cutting member movable with respect to the frame, removable cooperating cutting dies positioned in both the frame and the cutting member, a pivotal point upon which t-he movable member is positioned, whereby the dies in the movable member are adapted to be moved in an arc about said pivotal point, and means `for accomplishing said arcuate movement of the dies, said means including a shaft passing through the frame and the 'said pivotal point, and means for accom-A plishing said arcuate movement of the dies, sald means includmg a shaft passing through the frame and the movable cutting member, and an eccentric cam on said shaft adapted to cooperate with the cutting members.

3. In a shapes shear, a frame, a ycutting member movable with respect to the frame, removable cooperating cutting dies positioned in both the frame and the cutting member, a pivotal point upon which the movable member is positioned, whereby the dies in the movable y*member are adapted to be moved in an arc about said pivotal point, means for accomplishing said arcuate movement of the dies, said means including av shaft passing through the frame and the movable cutting member, an` eccentric cam on said shaft adapted to cooperate with the cutting member, and a single revolution clutch mounted on said camshaft, whereby the dies inthe fixed member and aligned at the end of each cutting" operation.

4. In ashapes shear, a frame, a cutting member movable with respect to the frame, and removable cooperating cutting dies positioned in both the frame and the cutting member, each die having cutting edges ythe movable member are automatically`- adapted to closely surround the material to be cut, and a pivotal point upon which the movable member is positionedsaid pivotal point being offset approximately 300, wheres by the dies in the movable member Vare adapted to be moved in an arc aboutsaid pivotal point, and means-for accomplishing .said arcuate lmovement of the dies, said means including a shaft passing through the frame and the movable cutting member, and an eccentriccam on said shafty adapted to cooperate withthe cutting member, and a single revolution clutch mounted on said cam shaft whereby the dies in the fixed member and the movable member are auto-` matically aligned at the end of each cuttingV operation. v

In testimony whereof I aHX my signature. i

HARRY J. DONAHOO.y i' 

